You can select your power from the dropdownlist, it's same power for both lenses. For mix of power, please choose 1 from the dropdownlist and key in 1 in the column below the dropdownlist. Please check stock availability in the dropdownlist 1st. Just like below.

If it's out of stock, it will prompt out of stock notice.

If the power is not shown, it means we do not have that power.

If there is no column shown below the Select Power, it means power comes in same per pair, so you have to get 2 pairs for different prescription.

Please take note that 12 months replacement period is a maximum period you can use. After you opened the lenses, it depends on the frequency you used. It's wearandtear product, the more frequent you use, you shall dispose it in shorter period time frame. The longest you can use is 12 months. Says you used it every day, then we advise you to dispose it within 3 months.